PartsTable TECHNICAL DATA SHEET
JULY 2026Technical Data Sheet

MIL-V-25023Cock,poppet Drain

Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M · NSN 4820-01-397-1755 · FSC 4820 · No Item Name Available
Verified by PartsTable
NSN 4820-01-397-1755 — this item is cataloged by the U.S. Government under National Stock Number 4820-01-397-1755. Primary manufacturer part number: MIL-V-25023.
Features
  • Cock,poppet Drain — FSC 4820
  • Surface Treatment: ANODIZE
  • Flow Control Device: POPPET
  • Thread Direction: RIGHT-HAND FIRST END
  • Valve Operation Method: MANUAL
  • Thread Class: 3A FIRST END A
  • Thread Series Designator: UNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
  • Material: ALUMINUM ALLOY OVERALL
Applications
  • Applications requiring Aluminum Alloy Overall construction
General Description

The Cock,poppet Drain, cataloged under National Stock Number 4820-01-397-1755, is classified within Federal Supply Class 4820 (No Item Name Available) of the Valves group. The primary manufacturer of record is Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M. Government technical data includes 11 verified specifications, sourced from the Federal Logistics Information System (FLIS). This item has 4 commercial cross-references from 3 manufacturers, enabling identification through both NSN and commercial part number lookups. 10 verified substitutes exist in the FLIS interchangeability database. Current acquisition status: Cancelled.

Technical Specifications
ParameterValue
NSN4820-01-397-1755
Primary Part NumberMIL-V-25023
Item NameCock,poppet Drain
FSC / FSG4820 / 48 — No Item Name Available
ManufacturerMilitary Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
StatusCANCELLED
Surface TreatmentANODIZE
Flow Control DevicePOPPET
Thread DirectionRIGHT-HAND FIRST END
Valve Operation MethodMANUAL
Thread Class3A FIRST END A
Thread Series DesignatorUNIFIED NATIONAL JOINT FINE (UNJF) FIRST END
MaterialALUMINUM ALLOY OVERALL
Style DesignatorANGLE
Nominal Thread Size0.875 INCHES FIRST END IN
Connection StyleEXTERNAL SEAT FOR GASKET SEAL (BOSS) FIRST END
Connection TypeTHREADED EXTERNAL BOSS FIRST END
Lifecycle & Compliance
Acquisition StatusCANCELLED
HAZMATNo
Verified Substitutes 10
4820-00-097-0325 INTERCHANGEABLE
Cock,poppet Drain
4820-00-202-6014 INTERCHANGEABLE
Cock,poppet Drain
4820-00-202-6250 INTERCHANGEABLE
Cock,plug
4820-00-203-6321 INTERCHANGEABLE
Cock,poppet Drain
4820-00-289-3939 INTERCHANGEABLE
Cock,poppet Drain
4820-00-540-103772D-8 INTERCHANGEABLE
Valve Fuel Drain
Auto-Valve, Inc
1015-00-618-37456183745 INTERCHANGEABLE
Bellows
U S Army Tank Automotive Command Amsta-Im-Mm
4820-00-988-3682 INTERCHANGEABLE
Valve,globe
4820-01-114-6672 INTERCHANGEABLE
Cock,poppet Drain
4820-01-475-9783 INTERCHANGEABLE
Cock,poppet Drain
Cross-Reference Index
Part NumberManufacturer
MIL-V-25023 Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M
MS29571-5 Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M
95C5 Auto-Valve, Inc (USA)
MS29571-5 Auto-Valve, Inc (USA)
Related Parts
4820-00-097-0325INTERCHANGEABLE
COCK,POPPET DRAIN
4820-00-202-6014INTERCHANGEABLE
COCK,POPPET DRAIN
4820-00-202-6250INTERCHANGEABLE
COCK,PLUG
4820-00-203-6321INTERCHANGEABLE
COCK,POPPET DRAIN
4820-00-289-3939INTERCHANGEABLE
COCK,POPPET DRAIN
4820-00-540-1037INTERCHANGEABLE
VALVE FUEL DRAIN
72D-8
1015-00-618-3745INTERCHANGEABLE
BELLOWS
6183745
4820-00-988-3682INTERCHANGEABLE
VALVE,GLOBE
4820-01-114-6672INTERCHANGEABLE
COCK,POPPET DRAIN
4820-01-475-9783INTERCHANGEABLE
COCK,POPPET DRAIN

Frequently Asked Questions

What is NSN 4820-01-397-1755?

NSN 4820-01-397-1755 is a Cock,poppet Drain, manufactured by Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M, classified under FSC 4820 (No Item Name Available). Status: cancelled.

What are the part numbers for NSN 4820-01-397-1755?

NSN 4820-01-397-1755 has 4 cross-referenced part numbers: MIL-V-25023 (Military Specifications Promulgated by Military Departments/agencies Under Authority of Defense Standardization Manual 4120 3-M), MS29571-5 (Military Standards Promulgated by Military Departments Under Authority of Defense Standardization Manual 4120 3-M), 95C5 (Auto-Valve, Inc), MS29571-5 (Auto-Valve, Inc).

What NSN replaces 4820-01-397-1755?

There are 10 known substitutes for 4820-01-397-1755: 4820-00-097-0325, 4820-00-202-6014, 4820-00-202-6250 and 7 more. Verify interchangeability with system specifications before substitution.

What are the specifications of MIL-V-25023?

Key specifications for MIL-V-25023: Surface Treatment: ANODIZE; Flow Control Device: POPPET; Thread Direction: RIGHT-HAND FIRST END; Valve Operation Method: MANUAL. 13 total characteristics are documented in the Federal Logistics Information System.

Is NSN 4820-01-397-1755 still in active supply?

NSN 4820-01-397-1755 is currently cancelled. Check with the Defense Logistics Agency for current availability and authorized substitutes.

Validated with multiple authoritative sources, including Government, OEM, and Certified sources.
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